//Change Log:
//* Updated: July 11th, 07: Fixed bug with persistence not working. Doh.
//* Updated: July 9th, 07: Added session only persistence to tabs (set "enabletabpersistence" var below). Only .js file changed.
//* Updated Nov 8th, 06. Ability to select a tab dynamically, by calling a method (ie: via a link). Only .js file changed.

var bustcachevar=1 //bust potential caching of external pages after initial request? (1=yes, 0=no)
var loadstatustext="<br /><br /><br /><br /><center><img src='http://www.reelson.org/images/ajax-loader3.gif' align='absmiddle'/> Chargement de la page...</center><br /><br /><br /><br />"
var enabletabpersistence=1 //enable tab persistence via session only cookies, so selected tab is remembered (1=yes, 0=no)?

////NO NEED TO EDIT BELOW////////////////////////
var loadedobjects=""
var defaultcontentarray=new Object()
var bustcacheparameter=""

function ajaxpage(url, containerid, targetobj)  //Fonction AJAX permet de passer les paramètre dans la requete
{
	var page_request = false
	if (window.XMLHttpRequest) // if Mozilla, IE7, Safari etc
		page_request = new XMLHttpRequest()
	else if (window.ActiveXObject)
	{ // if IE
		try
		{
				page_request = new ActiveXObject("Msxml2.XMLHTTP")
		} 
		catch (e)
		{
			try
			{
				page_request = new ActiveXObject("Microsoft.XMLHTTP")
			}
			catch (e){}
		}
	}
	else
		return false
		
	var ullist=targetobj.parentNode.parentNode.getElementsByTagName("li")
	for (var i=0; i<ullist.length; i++)
		ullist[i].className=""  //deselect all tabs

	targetobj.parentNode.className="selected"  //highlight currently clicked on tab
	if (url.indexOf("#default")!=-1)
	{ //if simply show default content within container (verus fetch it via ajax)
		document.getElementById(containerid).innerHTML=defaultcontentarray[containerid]
		return
	}
	
	document.getElementById(containerid).innerHTML=loadstatustext
	page_request.onreadystatechange=function()
	{
		loadpage(page_request, containerid)
	}
	if (bustcachevar) //if bust caching of external page
		bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
	
	page_request.open('GET', url+bustcacheparameter, true)
	page_request.send(null)
}

function loadpage(page_request, containerid)
{
	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
		document.getElementById(containerid).innerHTML=page_request.responseText
}

function loadobjs(revattribute)
{
	if (revattribute!=null && revattribute!="")
	{ //if "rev" attribute is defined (load external .js or .css files)
		var objectlist=revattribute.split(/\s*,\s*/) //split the files and store as array
		for (var i=0; i<objectlist.length; i++)
		{
			var file=objectlist[i]
			var fileref=""
			
			if (loadedobjects.indexOf(file)==-1)
			{ //Check to see if this object has not already been added to page before proceeding
				if (file.indexOf(".js")!=-1)
				{ //If object is a js file
					fileref=document.createElement('script')
					fileref.setAttribute("type","text/javascript");
					fileref.setAttribute("src", file);
				}
				else if (file.indexOf(".css")!=-1)
				{ //If object is a css file
					fileref=document.createElement("link")
					fileref.setAttribute("rel", "stylesheet");
					fileref.setAttribute("type", "text/css");
					fileref.setAttribute("href", file);
				}
			}
			if (fileref!="")
			{
				document.getElementsByTagName("head").item(0).appendChild(fileref)
				loadedobjects+=file+" " //Remember this object as being already added to page
			}
		}
	}
}

function expandtab(tabcontentid, tabnumber){ //interface for selecting a tab (plus expand corresponding content)
var thetab=document.getElementById(tabcontentid).getElementsByTagName("a")[tabnumber]
if (thetab.getAttribute("rel")){
ajaxpage(thetab.getAttribute("href"), thetab.getAttribute("rel"), thetab)
loadobjs(thetab.getAttribute("rev"))
}
}

function savedefaultcontent(contentid){// save default ajax tab content
if (typeof defaultcontentarray[contentid]=="undefined") //if default content hasn't already been saved
defaultcontentarray[contentid]=document.getElementById(contentid).innerHTML
}

function startajaxtabs(){
for (var i=0; i<arguments.length; i++){ //loop through passed UL ids
var ulobj=document.getElementById(arguments[i])
var ulist=ulobj.getElementsByTagName("li") //array containing the LI elements within UL
var persisttabindex=(enabletabpersistence==1)? parseInt(getCookie(arguments[i])) : "" //get index of persisted tab (if applicable)
var isvalidpersist=(persisttabindex<ulist.length)? true : false //check if persisted tab index falls within range of defined tabs
for (var x=0; x<ulist.length; x++){ //loop through each LI element
var ulistlink=ulist[x].getElementsByTagName("a")[0]
ulistlink.index=x
if (ulistlink.getAttribute("rel")){
var modifiedurl=ulistlink.getAttribute("href").replace(/^http:\/\/[^\/]+\//i, "http://"+window.location.hostname+"/")
ulistlink.setAttribute("href", modifiedurl) //replace URL's root domain with dynamic root domain, for ajax security sake
savedefaultcontent(ulistlink.getAttribute("rel")) //save default ajax tab content
ulistlink.onclick=function(){
ajaxpage(this.getAttribute("href"), this.getAttribute("rel"), this)
loadobjs(this.getAttribute("rev"))
saveselectedtabindex(this.parentNode.parentNode.id, this.index)
return false
}
if ((enabletabpersistence==1 && persisttabindex<ulist.length && x==persisttabindex) || (enabletabpersistence==0 && ulist[x].className=="selected")){
ajaxpage(ulistlink.getAttribute("href"), ulistlink.getAttribute("rel"), ulistlink) //auto load currenly selected tab content
loadobjs(ulistlink.getAttribute("rev")) //auto load any accompanying .js and .css files
}
}
}
}
}

////////////Persistence related functions//////////////////////////

function saveselectedtabindex(ulid, index){ //remember currently selected tab (based on order relative to other tabs)
if (enabletabpersistence==1) //if persistence feature turned on
setCookie(ulid, index)
}

function getCookie(Name){ 
var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
if (document.cookie.match(re)) //if cookie found
return document.cookie.match(re)[0].split("=")[1] //return its value
return ""
}

function setCookie(name, value){
document.cookie = name+"="+value //cookie value is domain wide (path=/)
}